It's a law of the universe that whenever you need a jewel case, there are none to be found. If you find yourself needing to mail a CD, make an envelope out of a milk carton to keep them protected.

This hack is super easy—certainly easier than driving to the office supply store for a CD case. All you need are some scissors and some way to seal off the bottom of the envelope. To make the envelope, you just cut off enough of the top and the bottom to make a slightly-larger-than-CD-sized box, flatten it out, and cut off a little "envelope lip" to close the top. The creator of the carton-envelope, BCome, used a sewing machine but if you're not too set on style, a strip of duct tape would do just fine (though I'd put the carton envelope in another envelope to mail it with this method). Check out the link to BCome's blog and the Unplgged post for more pictures and detailed instructions. Got any other snail mail hacks? Sound off in the comments!